/*
 * vim:ts=4:sw=4:expandtab
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdbool.h>
#include <stdint.h>
#include <err.h>

#include <xcb/xkb.h>

int main() {
    printf("ohai\n");
    int screen;
    xcb_connection_t *conn = xcb_connect(NULL, &screen);
    if (!conn)
        err(1, "cannot open display\n");

    const xcb_query_extension_reply_t *extreply;

    extreply = xcb_get_extension_data(conn, &xcb_xkb_id);
    if (!extreply->present)
        err(1, "not present\n");

    int fe = extreply->first_event;
    printf("first event = %d\n", fe);


    printf("querying xkb...\n");
    xcb_xkb_use_extension_cookie_t cookie = 
    xcb_xkb_use_extension(conn, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);
    xcb_xkb_use_extension_reply_t *reply = xcb_xkb_use_extension_reply(conn, cookie, NULL);
    printf("reply = %p\n", reply);
    printf("supported = %d, major = %d, minor = %d\n", reply->supported, reply->serverMajor, reply->serverMinor);

    uint16_t selectAll = XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_STATE_NOTIFY;
    uint16_t affectWhich = XCB_XKB_EVENT_TYPE_MAP_NOTIFY | XCB_XKB_EVENT_TYPE_STATE_NOTIFY;
    uint16_t clear = affectWhich & (~selectAll);
    uint16_t affectMap = 
        XCB_XKB_MAP_PART_KEY_TYPES |
        XCB_XKB_MAP_PART_KEY_SYMS |
        XCB_XKB_MAP_PART_MODIFIER_MAP |
        XCB_XKB_MAP_PART_EXPLICIT_COMPONENTS |
        XCB_XKB_MAP_PART_KEY_ACTIONS |
        XCB_XKB_MAP_PART_KEY_BEHAVIORS |
        XCB_XKB_MAP_PART_VIRTUAL_MODS |
        XCB_XKB_MAP_PART_VIRTUAL_MOD_MAP;
    uint16_t map = affectMap;

    xcb_xkb_select_events_details_t foo;



    xcb_xkb_select_events(conn,
            XCB_XKB_ID_USE_CORE_KBD, 
            affectWhich,
            clear,
            selectAll,
            affectMap,
            map,
            &foo);

    xcb_flush(conn);

    xcb_generic_event_t *event;

    while ((event = xcb_wait_for_event(conn))) {
        if (event->response_type == 0)
            errx(1, "XCB: Invalid event received");

        /* Strip off the highest bit (set if the event is generated) */
        int type = (event->response_type & 0x7F);
        printf("got event of type %d\n", type);

        if (type != fe) {
            printf("skipping\n");
            continue;
        }

        xcb_xkb_map_notify_event_t *e = event;
        printf("e->device = %d, e->time = %d, e->type = %d\n", e->deviceID, e->time, e->response_type);
    }

}